-
[show abstract]
[hide abstract]
ABSTRACT: The new Delta-Sigma experimental data on the ratio R
dp
allowed separating the Flip and Non-Flip parts of the np → pn charge exchange process at the zero angle by the Dean formula. The PSA solutions for the np → np elastic scattering are transformed to the np → pn charge exchange representation using unitary transition, and good agreement is obtain.
The European Physical Journal Special Topics 05/2012; 162(1):117-123. · 1.56 Impact Factor
-
V. I. Sharov,
A. A. Morozov,
R. A. Shindin,
V. G. Antonenko,
S. B. Borzakov,
Yu. T. Borzunov, E. V. Chernykh,
V. F. Chumakov,
S. A. Dolgii,
M. Finger, [......],
M. Slunečka,
V. Slunečková,
A. Yu. Starikov,
L. N. Strunov,
T. A. Vasiliev,
E. I. Vorobiev,
I. P. Yudin,
I. V. Zaitsev,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: New experimental results on ratio R
dp
of the quasielastic charge-exchange yield at the outgoing proton angle θ
p,lab = 0° for the nd → p(nn) reaction to the elastic np → pn charge-exchange yield, are presented. The measurements were carried out at the Nuclotron of the Veksler and Baldin Laboratory
of High Energies of the JINR (Dubna) at the neutron-beam kinetic energies of 0.55, 0.8, 1.0, 1.2, 1.4, 1.8, and 2.0 GeV. The
intense neutron beam with small momentum spread was produced by breakup of deuterons which were accelerated and extracted
to the experimental hall. In both reactions mentioned above the outgoing protons with the momenta p
p
approximately equal to the neutron-beam momentum p
n,beam were detected in the directions close to the direction of incident neutrons, i.e., in the vicinity of the scattering angle
θ
p,lab = 0°. Measured in the same data-taking runs, the angular distributions of the charge-exchange-reaction products were corrected
for the well-known instrumental effects and averaged in the vicinity of the incident-neutron-beam direction. These corrected
angular distributions for every of nd → p(nn) and np → pn charge-exchange processes were proportional to the differential cross sections of the corresponding reactions. The data were
accumulated by Delta-Sigma setup magnetic spectrometer with two sets of multiwire proportional chambers located upstream and
downstream of the momentum analyzing magnet. Inelastic processes were considerably reduced by the additional detectors surrounding
the hydrogen and deuterium targets. The time-of-flight system was applied to identify the detected particles. The accumulated
data treatment and analysis, as well as possible sources of the systematic errors are discussed.
PACS numbers13.75.Cs-25.40.Kv-25.60.Bx-25.10.+s
Physics of Atomic Nuclei 04/2012; 72(6):1007-1020. · 0.57 Impact Factor
-
L. N. Strunov,
V. G. Antonenko,
S. B. Borzakov,
Yu. T. Borzunov, E. V. Chernykh,
V. F. Chumakov,
Yu. I. Ivanshin,
S. A. Dolgii,
M. Finger,
L. B. Golovanov, [......],
V. I. Sharov,
R. A. Shindin,
M. Slunečka,
V. Slunečková,
A. Yu. Starikov,
T. A. Vasiliev,
I. P. Yudin,
I. V. Zaitsev,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: The measurements of np-spin observables at 0° have been performed for the first time on the Delta-Sigma experimental facility of LHE JINR up to
P
n
= 4.5 GeV/c using the monochromatic neutron beam. They include detailed measurements of the Δσ
L(np) spin differences and the study of the np → pn elastic charge-exchange process. In the Δσ
L(np) and −Δσ
L(I = 0) energy dependencies over the energy region Tkin = 1.2–3.7 GeV the peculiarity at 1.8 GeV was observed. Such energy behavior was predicted by the QCD approach as a signal
of the NN → 6q phase transition. For the exhaustive investigation of this effect it is necessary to measure the energy dependence of the
complete set of np observables with both longitudinal (L) and transverse (T) polarizations of the neutron beam and proton target. This will allow Direct Reconstruction of all three NN forward Scattering Amplitudes (DRSA) to be performed, and the observed peculiarity to be checked around Tkin = 1.8 GeV and at the higher energies using the Argand diagrams method.
The European Physical Journal Special Topics 04/2012; 162(1):125-132. · 1.56 Impact Factor
-
A. A. Morozov,
V. G. Antonenko,
S. B. Borzakov,
Yu. T. Borzunov, E. V. Chernykh,
V. F. Chumakov,
S. A. Dolgii,
M. Finger,
L. B. Golovanov,
A. Janata, [......],
R. A. Shindin,
M. Slunečka,
V. Slunečková,
A. Yu. Starikov,
L. N. Strunov,
E. I. Vorobiev,
I. P. Yudin,
I. V. Zaitsev,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: The first results of the measurement of 0o of the cross-section ratioR
dp=0.50±0.02 in charge-exchange (np) reaction on H2/D2 targets at the neutron beam kinetic energie 1.0 GeV are presented. As a result the value of the ratio of non spin-flip to
spin-flip contribution innp→pn charge-exchange at 0o
r
np→pn
/nf/fl
=0.33±0.03 was obtained.
Czechoslovak Journal of Physics 04/2012; 55:A307-A314. · 0.42 Impact Factor
-
V. I. Sharov,
A. A. Morozov,
R. A. Shindin,
V. G. Antonenko,
S. B. Borzakov,
Yu. T. Borzunov, E. V. Chernykh,
V. F. Chumakov,
S. A. Dolgii,
M. Finger, [......],
M. Slunečka,
V. Slunečková,
A. Yu. Starikov,
L. N. Strunov,
T. A. Vasiliev,
E. I. Vorobiev,
I. P. Yudin,
I. V. Zaitsev,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: New experimental results on the ratio Rdp of the quasi-elastic charge-exchange yield at the outgoing proton angle qp,Lab \theta_{{p,{\rm Lab}}}^{} = 0° for the nd
® \rightarrow
p(nn) reaction to the elastic np
® \rightarrow
pn charge-exchange yield are presented. The measurements were carried out at the Nuclotron of the Veksler and Baldin Laboratory
of High Energies of the JINR (Dubna) at the neutron beam kinetic energies of 0.55, 0.8, 1.0, 1.2, 1.4, 1.8 and 2.0GeV. The
intense neutron beam with small momentum spread was produced by break-up of deuterons which were accelerated and extracted
to the experimental hall. In both reactions mentioned above the outgoing protons with the momenta p
p approximately equal to the neutron beam momentum p
n, beam were detected in the directions close to the direction of incident neutrons, i.e. in the vicinity of the scattering angle qp,Lab \theta_{{p,{\rm Lab}}}^{} = 0° . Measured in the same data taking runs, the angular distributions of the charge-exchange reaction products were corrected
for the well-known instrumental effects and averaged in the vicinity of the incident neutron beam direction. These corrected
angular distributions for every of nd
® \rightarrow
p(nn) and np
® \rightarrow
pn charge-exchange processes were proportional to the differential cross-sections of the corresponding reactions. The data were
accumulated by the Delta-Sigma set-up magnetic spectrometer with two sets of multiwire proportional chambers located upstream
and downstream of the momentum analyzing magnet. Inelastic processes were considerably reduced by the additional detectors
surrounding the hydrogen and deuterium targets. The time-of-flight system was applied to identify the detected particles.
The new Rdp data are compared with the existing ones, which were obtained below 1GeV, and with the calculations which were made using
the phenomenological NN amplitude sets.
European Physical Journal A 01/2009; 39(3):267-280. · 2.19 Impact Factor
-
[show abstract]
[hide abstract]
ABSTRACT: A design-experimental study of a magnetic cumulation generator (further referred to as generator) with flat helical is performed.
This generator combines advantages of both spiral-cylindrical and disk generators. As to speed of operation, the spiral-radial
generator is equivalent to the disk generator, but can operate in high-impedance loads. To calculate characteristics of spiral-radial
generators, including external-excitation generators, a semiempirical procedure for determining laws of variations of the
inductances and mutual inductance of helical of the generator is developed. The procedure is based on measuring the current
oscillation frequency in the course of the magnetic-field compression, while the helix is loaded into a small capacitance.
A satisfactory compliance of the experimental data and semiempirical calculations is obtained. The experimental effective
time values of the current buildup of the spiral-radial generators do not exceed the same characteristic for spiral-cylindrical
generators with an axial charge initiation of the explosive material. A possibility of further decreasing the effective time
is shown for the plane-parallel throwing of liner plates.
Instruments and Experimental Techniques 12/2008; 52(1):58-64. · 0.36 Impact Factor
-
V. I. Sharov,
N. G. Anischenko,
V. G. Antonenko,
S. A. Averichev,
L. S. Azhgirey,
V. D. Bartenev,
N. A. Bazhanov,
A. A. Belyaev,
N. A. Blinov,
N. S. Borisov, [......],
L. N. Strunov,
A. L. Svetov,
Yu. A. Usov,
T. Vasiliev,
V. I. Volkov,
E. I. Vorobiev,
I. P. Yudin,
I. V. Zaitsev,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: New accurate data of the neutron-proton spin-dependent total-cross-section difference Δσ
L(np) at the neutron-beam kinetic energies 1.39, 1.69, 1.89, and 1.99 GeV are presented. In general, these data complete the measurements
of energy dependence of Δσ
L(np) over the Dubna Synchrophasotron energy region. Measurements were carried out at the Synchrophasotron of the Veksler and
Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research. The quasi-monochromatic neutron beam was produced
by breakup of extracted polarized deuterons. The deuteron (and hence neutron) polarization direction was flipped every accelerator
burst. The initial transverse (with respect to beam momentum) neutron polarization was changed to a longitudinal one and longitudinally
polarized neutrons were transmitted through the large proton longitudinally polarized target. The target polarization direction
was inverted after one to two days of measurements. Four different combinations of the beam and target parallel and antiparallel
polarization directions, both oriented along the neutron-beam momentum, were used at each energy. A fast decrease in −Δσ
L(np) with increasing energy above 1.1 GeV and a structure in the energy dependence around 1.8 GeV, first observed from our previous
data, seem to be well revealed. The new results are also compared with model predictions and with phase-shift analysis fits.
The Δσ
L quantities for isosinglet state I = 0, deduced from the measured Δσ
L(np) values and known Δσ
L(pp) data, are also given. The results of the measurements of unpolarized total cross sections σ
0tot(np) at 1.3, 1.4, and 1.5 GeV and σ
0tot(nC) at 1.4 and 1.5 GeV are presented as well. These data were obtained using the same apparatus and high-intensity unpolarized
deuteron beams extracted either from the Synchrophasotron or from the Nuclotron.
Physics of Atomic Nuclei 10/2005; 68(11):1796-1811. · 0.57 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: High-power microwave radiation has been generated using a relativistic backward wave oscillator (BWO) powered by a high voltage
source comprising an inductive energy storage and an electric-explosion current switch. The high voltage source and the BWO
magnetic system are energy pumped by explosive magnetocumulative generators. In experiments, the proposed setup generated
30-ns single-mode radiation pulses with a carrier frequency of 3.6 GHz at an output power of 0.75 GW.
Technical Physics Letters 08/2005; 31(9):775-778. · 0.56 Impact Factor
-
V. I. Sharov,
N. G. Anischenko,
V. G. Antonenko,
S. A. Averichev,
L. S. Azhgirey,
V. D. Bartenev,
N. A. Bazhanov,
A. A. Belyaev,
N. A. Blinov,
N. S. Borisov, [......],
L. N. Strunov,
A. L. Svetov,
Yu. A. Usov,
T. Vasiliev,
V. I. Volkov,
E. I. Vorobiev,
I. P. Yudin,
I. V. Zaitsev,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: New accurate data on the neutron-proton spin-dependent total cross section difference Δσ
L(np) at the neutron beam kinetic energies 1.4, 1.7, 1.9 and 2.0 GeV are presented. A number of physical and methodical results
on investigation of an elasticnp→pn charge exchange process over a few GeV region are also presented. Measurements were carried out at the Synchrophasotron and
Nuclotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research.
Czechoslovak Journal of Physics 12/2004; 55:A289-A305. · 0.42 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: The problem of separation of elastic and inelastic parts of a proton spectrum ofnp-interaction at energies 1–2 GeV is successfully solved. The factor of suppression of the inelastic background equals five
at energy T
n
=2 GeV.
Czechoslovak Journal of Physics 12/2004; 55:A399-A405. · 0.42 Impact Factor
-
V. I. Sharov,
N. G. Anischenko,
V. G. Antonenko,
S. A. Averichev,
L. S. Azhgirey,
V. D. Bartenev,
N. A. Bazhanov,
A. A. Belyaev,
N. A. Blinov,
N. S. Borisov, [......],
L. N. Strunov,
A. L. Svetov,
Yu A. Usov,
T. Vasiliev,
V. I. Volkov,
E. I. Vorobiev,
I. P. Yudin,
I. V. Zaitsev,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: New accurate results of the neutron-proton spin-dependent total cross section difference
DsL(np)\Delta\sigma_{\mathrm L}(np)
at the neutron beam kinetic energies 1.39, 1.69, 1.89 and 1.99 GeV are presented. Measurements were carried out in 2001 at the Synchrophasotron of the Veksler and Baldin Laboratory of High Energies of the Joint Institute for Nuclear Research. A quasi-monochromatic neutron beam was produced by break-up of extracted polarized deuterons. The deuteron (and hence neutron) polarization direction was flipped every accelerator burst. The vertical neutron polarization direction was rotated onto the neutron beam direction and longitudinally (L) polarized neutrons were transmitted through a large proton L-polarized target. The target polarization vector was inverted after 1-2 days of measurements. The data were recorded for four different combinations of the beam and target parallel and antiparallel polarization directions at each energy. A fast decrease of
DsL(np)\Delta\sigma_{\mathrm L}(np)
with increasing energy above 1.1 GeV was confirmed. The structure in the
DsL(np)\Delta\sigma_{\mathrm L}(np)
energy dependence around 1.8 GeV, first observed from our previous data, seems to be well pronounced. The new results are also compared with model predictions and with phase shift analysis fits. The
DsL\Delta\sigma_{\mathrm L}
quantities for isosinglet state I = 0, deduced from the measured
DsL(np)\Delta\sigma_{\mathrm L}(np)
values and the known
DsL(pp)\Delta\sigma_{\mathrm L}(pp)
data, are also given. The results were completed by the measurements of unpolarized total cross sections
s0tot(np)\sigma_{0\mathrm{tot}}(np)
at 1.3, 1.4 and 1.5 GeV and
s0tot(n\sigma_{0\mathrm{tot}}(n
C) at 1.4 and 1.5 GeV. These data were obtained using the same apparatus and high intensity unpolarized deuteron beams were extracted either from the Synchrophasotron, or from the Nuclotron.
European Physical Journal C 08/2004; 37(1):79-90. · 3.63 Impact Factor
-
V. I. Sharov,
B. P. Adiasevich,
N. G. Anischenko,
V. G. Antonenko,
S. A. Averichev,
L. S. Azhgirey,
V. D. Bartenev,
N. A. Bazhanov,
N. A. Blinov,
N. S. Borisov, [......],
A. L. Svetov,
Yu. A. Usov,
V. I. Volkov,
E. I. Vorobiev,
V. P. Yershov,
I. P. Yudin,
I. V. Zaitsev,
S. A. Zaporozhets,
A. A. Zhdanov,
V. N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: New data on the spin-dependent np observables measured with quasi-monochromatic polarized neutron beam in the energy region from 1.2 to 3.7 GeV are presented.
Further measurements of np scattering observables using the JINR LHE polarization facility (longitudinal and transverse polarized neutron beams and
a polarized proton target) are discussed. The aim of these studies is to determine the imaginary and real parts of the forward
scattering amplitudes for np and for isospin I=0 systems above 1.1 GeV.
Czechoslovak Journal of Physics 12/2000; 51:A87-A96. · 0.42 Impact Factor
-
V.I. Sharov,
S.A. Zaporozhets,
B.P. Adiasevich,
N.G. Anischenko,
V.G. Antonenko,
L.S. Azhgirey,
V.D. Bartenev,
N.A. Bazhanov,
N.A. Blinov,
N.S. Borisov, [......],
A.Yu. Starikov,
G.D. Stoletov,
L.N. Strunov,
A.L. Svetov,
A.P. Tsvinev,
Yu.A. Usov,
V.I. Volkov,
V.P. Yershov,
A.A. Zhdanov,
V.N. Zhmyrov
[show abstract]
[hide abstract]
ABSTRACT: New results of the neutron-proton spin-dependent total cross section difference at the neutron beam kinetic energies 1.59, 1.79 and 2.20 GeV are presented. Measurements were performed at the Synchrophasotron
of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna. A quasi-monochromatic neutron beam
was produced by break-up of extracted polarized deuterons. Neutrons were transmitted through a large polarized proton target.
Measurements were performed either with a parallel or an antiparallel beam and target polarizations, both oriented along the
beam momentum. The results at the two higher energies were measured with two opposite beam and target polarization directions.
Only one target polarization direction was available at 1.59 GeV. The present measurements agree well with existing data.
A fast decrease of the values with increasing energy above 1.1 GeV was confirmed. The new results are also compared with model predictions and with
phase shift analysis fits. The quantities for isosinglet state I=0, deduced from the measured values and known data, are given.
European Physical Journal C 02/2000; 13(2):255-265. · 3.63 Impact Factor
-
V. I. Sharov,
S. A. Zaporozhets,
N. G. Anischenko,
V. D. Bartenev,
N. A. Blinov,
Yu. T. Borzunov,
Yu. P. Bushuev, E. V. Chernykh,
S. A. Dolgii,
V. M. Drobin, [......],
V. G. Antonenko,
Yu. P. Polunin,
G. M. Gurevich,
A. A. Kochetkov,
M. S. Nikitina,
A. P. Dzyubak,
A. A. Lukhanin,
G. Durand,
F. Lehar,
A. de Lesquen
[show abstract]
[hide abstract]
ABSTRACT: New results for the np spin-dependent total cross section difference Δσ
p
(np) at neutron beam kinetic energies of 1.59, 1.79 and 2.20 GeV are presented. Measurements of the Δσ
p
(np) energy dependence were carried out at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for
Nuclear Research in Dubna. The values of Δσ
L
were measured as a difference between the np total cross sections for parallel and antiparallel beam and target polarizations, both oriented along the beam momentum.
A fast decrease of Δσ
p
(np) with increasing energy above 1.1 GeV, as it was first seen from our previous data, was confirmed. The new results are also
compared with model predictions and with the phase shift analysis fits. The Δσ
L
quantities for isosinglet state I=0, deduced from the measured values of Δσ
p
(np) and known Δσ
p
(pp) data, are given.
Czechoslovak Journal of Physics 12/1999; 50:325-330. · 0.42 Impact Factor
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[show abstract]
[hide abstract]
ABSTRACT: Inductive storage of energy (IS) with EEOS allows one to charge forming line during about 10<sup>-7</sup> sec therefore providing high electrical strength of insulation as well as small size and weight. In the paper, by means of numerical simulation and physical modeling three schemes of device with primary source energy amplifier-explosive magnetic generator (EMG) are analyzed. The schemes are distinguished by the charging models: a) EMG+dynamic transformer+IS+EEOS, b) EMG+transformer IS(TIS)+EEOS and c) EMG+EEOS+TIS. The basic parameter defining efficiency of the device operation is (√L<sub>IS</sub>C <sub>FL</sub>)/τ which is the characteristic time of (IS-FL) circuit to time constant of EEOS ratio. The last is practically a single-valued function of effective (by EEOS current action integral) EMG current rise-time. Scheme a) in comparison with scheme c) provides the minimum rise-time of voltage across FL as a capacitor, but boosts it in efficiency of energy transfer, overall dimensions (wire case sizes are bigger than FL ones and have the maximum achievable voltage peak). Scheme b) is an intermediate one by its characteristics. The fulfilled analysis of the given schemes in comparison with the same schemes with a bank of capacitors as a power source, showed a significant advantage of EMG used in a wide range of FL capacitance (up to subnanofarads) at FL energy content of more than 10<sup>2</sup> J
Microwave Conference, 1999. Microwave & Telecommunication Technology. 1999 9th International Crimean [In Russian with English abstracts]; 02/1999
-
[show abstract]
[hide abstract]
ABSTRACT: At present, MCGs are the most powerful energy sources. Existing level of high technology as well as numerical simulation methods allow one to create MCGs with characteristics varying over a wide range of values, which gives new prospects for creation of compact MCGs for different pulsed power applications. By estimate, we select the circuit consisting of MCG, electroexplosive opening switch, pulse transformer and forming line (FL) with water insulation. MCG winding is connected in series with EEOS and primary winding of the transformer which is used as an intermediate inductive storage. By the end of MCG operation the current through the primary winding of the transformer is maximum. EEOS characteristics are properly chosen to set up wire explosion by this instance and to break the circuit of primary winding of the transformer. In result, in the secondary winding a high emf is induced, which allows one to charge the FL up to the voltage 450-500 kV during a short time period (approximately 200 ns).
Microwave Conference, 1999. Microwave & Telecommunication Technology. 1999 9th International Crimean [In Russian with English abstracts]; 02/1999
-
L. S. Azhgirey, E. V. Chernykh,
A. P. Kobushkin,
V. P. Ladygin,
S. Nedev,
L. Penchev,
C. F. Perdrisat,
N. M. Piskunov,
V. Punjabi,
I. M. Sitnik,
G. D. Stoletov,
E. A. Strokovsky,
A. I. Syamtomov,
V. V. Vikhrov,
L. Vizireva,
et al
Physics of Atomic Nuclei 02/1998; 61:432-447. · 0.57 Impact Factor
-
B. P. Adiasevich,
V. G. Antonenko,
S. A. Averichev,
L. S. Azhgirey,
J. Ball,
N. A. Bazhanov,
B. Benda,
N. S. Borisov,
Yu. T. Borzunov,
E. I. Bunyatova, [......],
S. V. Topalov,
V. Yu. Trautman,
A. P. Tsvinev,
Yu. A. Usov,
V. V. Vikhrov,
V. I. Volkov,
A. A. Yershov,
V. P. Yershov,
S. A. Zaporozhets,
A. A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: Results of the total cross section differenceΔσ
L in anp transmission experiment at 1.19, 2.49 and 3.65 GeV incident neutron beam kinetic energies are presented. Measurements were
performed at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna.
Results were obtained with a polarized beam of free quasi-monochromatic neutrons passing through the new Dubna frozen spin
proton target. The beam and target polarizations were oriented longitudinally. The present results were obtained at the highest
energies of free polarized neutrons that can be reached at present. They extend the energy range of existing results from
PSI, LAMPF and Saclay measured between 0.066 and 1.10 GeV. The new results are compared withΔσ
L(pn) data determined as a difference betweenΔσ
L(pd) andΔσ
L(pp) ANL-ZGS measurements. The values ofΔσ
L for the isospin stateI=0 were deduced using knownpp data.
Zeitschrift für Physik C 04/1996; 71(1):65-74.
-
B. P. Adiasevich,
V. G. Antonenko,
S. A. Averichevl,
L. S. Azhgirey,
J. Balls,
N. A. Bazhanov,
B. Benda,
N. S. Borisov,
Yu. T. Borzunovl,
E. I. Bunyatova,
V. F. Burinov, E. V. Chernykh
[show abstract]
[hide abstract]
ABSTRACT: Results of the total cross section differenceΔσ
L in anp transmission experiment at 1.19, 2.49 and 3.65 GeV incident neutron beam kinetic energies are presented. Measurements were
performed at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna.
Results were obtained with a polarized beam of free quasi-monochromatic neutrons passing through the new Dubna frozen spin
proton target. The beam and target polarizations were oriented longitudinally. The present results were obtained at the highest
energies of free polarized neutrons that can be reached at present. They extend the energy range of existing results from
PSI, LAMPF and Saclay measured between 0.066 and 1.10 GeV. The new results are compared withΔσ
L(pn) data determined as a difference betweenΔσ
L(pd) andΔσ
L(pp) ANL-ZGS measurements. The values ofΔσ
L for the isospin stateI=0 were deduced using knownpp data.
European Physical Journal C - EUR PHYS J C. 01/1996; 71(1):65-74.
-
L. S. Azhgirey,
S. V. Afanasyev, E. V. Chernykh,
A. P. Kobushkin,
V. P. Ladygin,
S. Nedev,
L. Penchev,
C. F. Perdrisat,
N. M. Piskunov,
V. Punjabi,
I. M. Sitnik,
G. D. Stoletov,
E. A. Strokovsky,
A. I. Syamtomov,
S. A. Zaporozhets
[show abstract]
[hide abstract]
ABSTRACT: Experiments probing the deuteron structure at short distances with smooth transition to the intermediate and large distances provide a basis for crucial tests of the modern QCD‐motivated theory of strong interactions. Such data are particularly important when the internal momentum is too large to allow separate identities for the nucleons in the deuteron. The very notion of the wave function is not defined in this region at all. Progress has been achieved1,2 especially in the measurement of cross section data and polarization observables for the inclusive deuteron breakup A(d,p)X for beam momenta up to 9 GeV/c (Fig. 1). The main results are as follows: (1) the empirical momentum density (EMD) of the nucleon in the deuteron is almost independent of the deuteron energy, of the target and of the type of the inclusive breakup reaction (see Fig. 1b and refs.1,2). (2) Polarization observables are also largely independent of the target and initial energy up to 9 GeV/c, as follows from comparison of our new data with data of ref.2 (Fig. 1a,c,d). (3) Impulse Approximation (IA) predictions are in agreement with all data sets only for k≤150 MeV/c; a drastic disagreement is seen beyond this region. More complicated models, taking into account various additional contributions to the reaction mechanism, or ‘‘relativization effects,’’ result in a partial success for a given observable, but not for the whole set of observables (Fig. 1,2 and ref.3; see also references therein). © 1995 American Institute of Physics.
AIP Conference Proceedings. 05/1995; 334(1):415-418.
